悬浮填料与好氧颗粒污泥SND影响因素对比

A COMPARISON FACTORS OF SIMULTANEOUS NITRIFICATION-DENITRIFICATION IN AEROBIC GRANULAR SLUDGE REACTOR AND SUSPENDED PACKING BIOREACTOR

对比研究了推流式反应器中,生物膜法同步硝化反硝化(SND)、好氧颗粒污泥同步硝化反硝化pH、溶解氧(DO)、C/N比最优值,以及对有机负荷、氨氮负荷变化的适应能力等。试验结果表明,生物膜法SND的最适pH应在7.5左右,好养颗粒污泥在pH8～9的范围内TN有较好的去除效果。生物膜法SND与好氧颗粒污泥SND的最佳DO质量浓度均为3mg·L-1左右;生物膜法SND的最佳C/N比为12,好氧颗粒污泥SND的最佳C/N比为5。COD在某一范围内时,两者均不受COD影响,COD去除率分别可达到85%和95%左右;而当氨氮质量浓度不断升高时,两者氨氮去除率均降低,但生物膜法SND比好氧颗粒污泥SND的稳定性差。

Based on the plug-flow reactor,the optimal value between the biofilm simultaneous nitrification and denitrification （SND）,aerobic granular sludge simultaneous nitrification and denitrification （SND） PH value,dissolved oxygen （DO）,and C / N ratio,as well as the adaptive ability for the load changes of organic,ammonia nitrogen a were studied. It was found that the optimal PH value in biofilm reactor of simultaneous nitrification and denitrification was 7.5. Keeping aerobic granular sludge in the PH value of 8～9,it will lead a good result for TN removal. The optimal concentration of dissolved oxygen in biofilm reactor and aerobic granular sludge reactor was 3 mg·L^-1; The optimal ration of C / N ratio in biofilm reactor was 5,then in aerobic granular sludge reactor was 12; Under the max of organic concentration,which did not effect the removal rates of organic,organic removal rates reached 85% and 95%,respectively;When the ammonia concentration increased,the removal rates of nitrogen was lower,but the aerobic granular sludge reactor was more stability than the other one.